ahahaha. I fought Dario..ahahha.it's better to fight him using serge..bec u can use glenn and have the combo,,but it's also tough because both serge and riddle are white elemental,,, and dario is black element..ahhaha..but its just a peanut
..i thought the tactic was to never use any white or yellow or black elements against him ; since Dario's black attacks are monstrously power and no yellow b/c he'll counter w/ heal or poison? and no black b/c he'll recovery
The tactic here is to equip riddel the plate from the black dragon, and make her cast white elements while the others cast a red elements which will make dario cast numble forever.
then have serge to use at least a lvl 7 white spell on him before letting ur other surviving party to attack. after the white spell is used, use any lvl 5 spell to k.o. him.